The history of Thrissur District from the 9th to the 12th centuries is the history of Kulasekharas of Mahodayapuram and the historysince 12th century is the history of the rise and growth of Perumpadappu Swarupam. In the course of its long and chequered history, the Perumpadappu Swarupam had its capital at different places.

We learn from the literary works of the period that the Perumpadappu Swarupam had its headquarters at Mahodayapuram and that a number of Naduvazhies in Southern and Central Kerala recognized the supremacy of the Perumpadappu Moopil. The Perumpadappu Moopil is even referred to as the "Kerala Chakravarthi" in the "Sivavilasam" and some other works. One of the landmarks in the history of the Perumpadapu Swarupam is the foundation of a new era called Pudu Vaipu Era. The Pudu Vaipu Era is traditionally believed to have commenced from the date of which the island of Vypeen was thrown from the sea.

Pooram is one of the nakshatras or star in the hindu panchangam. There 27 Nakshatras in the hindu panchangam and a million or more temples in Kerala, and this combination creates numerous possibilities for auspicious occasions, with each temple having varying importance for the different stars. However, over the years, the pooram nakshatram has gained special significance in its association with temple festivals, mainly because of its association with Thrissur. It has now taken on a different meaning all together, because of the huge congregation of people during the pooram festival in Thrissur.

Thrissur Pooram - Overview

Thrissur Pooram is today, rightfully, called 'the pooram of all poorams' meaning the biggest or the best of all poorams. The Thrissur pooram, is celebrated every year, on the pooram day, in the month of Medam (mid-april to mid-may) month as per the malayalam calendar. While all poorams have a huge influence on surrounding neighborhoods and towns, few other festivals require their active involvement. Thrissur town plays host, for 36 hours from the wee hours of the pooram day, to one of the most largest collection of people and elephants. The richly decorated elephant, as seen during the Thrissur pooram, is now globally recognized, and its association with Kerala. On the pooram day, fifty (50) or more elephants will pass through the very center of Thrissur town, or the Vadakkunnathan temple. The main features of the pooram festival are these decorated elephants with their nettipattam (decorative headdress), beautiful craftedthe kolam, decorative bells and ornaments etc. Add to this the panchavadyam, the rhythmic beating of the drum, and what would be a cacophony otherwise is turned into an organized but spontaneous symphony. The fireworks display in the early hours of the next day, will rival shows held anywhere in the world, without even using many of the modern and newer pyrotechnics.

While India is considered to be between 5000 to 10000 years old, and many rituals, hindu customs and festivals date back centuries, the Thrissur pooram is only about 200 or more years old. It was orchestrated by the then ruler of Cochin, Sakthan Thampuran or Raja Rama Varma, in 1798. Sakthan Thampuran, so known for his firm and decisive administration, decided to break tradition and create a venue for the temples belonging to his region to celebrate their pooram festival.

Before the advent of Thrissur Pooram, the largest temple festival during summer in Thrissur thaluk was the one-day festival held at Arattupuzha, 12 km south of the city. Temples in and around Thrissur were regular participants of this religious exercise until they were denied entry by the chief of Peruvanam Gramam. The delay caused by the temples from Thrissur and Kuttanellur, was one of the reasons for denial. This caused the Thrissur Naduvazhi, the chief poojari of Vadakkunnathan, known as Yogadiripad and the Kuttanellur Naduvazhi started the pooram in Thrissur. This pooram started as an act of reprisal quickly lost its charm, after infighting between the two main Naduvazhis. It required the intervention of the ruler to get this right. Sakthan Thampuran unified the 10 temples situated around Vadakkunnathan temple and organized the celebration of Thrissur Pooram as a mass festival. Sakthan Thampuran ordained these temples into two groups, Western group and Eastern group.

The Western group as Thiruvambady consisting of Kanimangalam, Laloor, Ayyanthole, Nethilakkavu and the Thiruvambady temple, as the main one. The Eastern group called as Paramekkavu, consisting in addition to Paramekkavu temple, Karamukku, Chembukavu, Choorakottukavu and Panamukkamppilly. The pooram was to be centered around the Vadakkunnathan temple, with all these temples sending their poorams (the whole procession), to pay obeisance to the Shiva, the presiding deity. The Thampuran is believed to have chalked out the program and the main events of the Thrissur pooram festival. It is this historical background that determines the course of the pooram program and it is specifically the ruler's antipathy to the Brahmin aristocracy to open Thrissur pooram for the common man.